#3781BA#3781BA

#3781BA is a mid, moderate cyan. Relative luminance 0.201; OKLCH L 58.3% C 0.114 H 245.0°. Best body text is #000000 at 5.01:1 contrast (WCAG AA passes).

Color values

HEX	#3781BA
RGB	rgb(55, 129, 186)
HSL	hsl(206, 54%, 47%)
HSV	hsv(206, 70%, 73%)
CMYK	cmyk(70.4%, 30.6%, 0%, 27.1%)
CIE-LAB	lab(51.90, -4.03, -36.56)
CIE-LCH	lch(51.90, 36.78, 263.71°)
OKLab	oklab(58.29% -0.0483 -0.1034)
OKLCH	oklch(58.29% 0.114 245)
XYZ	xyz(18.2854, 20.0559, 49.3524)
Luminance	0.2006 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3781BA #BA7037

analogous

#37BAB2 #3781BA #373FBA

triadic

#3781BA #BA3781 #81BA37

tetradic

#3781BA #B237BA #BA7037 #3FBA37

square

#3781BA #B237BA #BA7037 #3FBA37

split-complementary

#3781BA #BA373F #BAB237

monochromatic

#1B3F5C #29608B #3781BA #5F9ED0 #8EBBDE

Accessibility & contrast

On white

4.19

#3781BA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.01

#3781BA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3781BA

5.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3781BA	#FFFFFF	#000000	##000000
##3781BA	1.00	4.19	5.01	5.01
#FFFFFF	4.19	1.00	21.00	21.00
#000000	5.01	21.00	1.00	1.00
##000000	5.01	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6783BC

Deuteranopia (green-blind)

#5576B9

Tritanopia (blue-blind)

#008F95

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #3781ba;
/* rgb */ color: rgb(55, 129, 186);
/* oklch */ color: oklch(58.3% 0.114 245.0);

Tailwind

colors: {
  custom: {
    50: '#7da5cf',
    500: '#3781ba',
    950: '#000000',
  },
}

SCSS

$custom: #3781ba;
$custom-light: #7da5cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3781ba",
  "rgb": {
    "r": 55,
    "g": 129,
    "b": 186
  },
  "hsl": {
    "h": 206.107,
    "s": 54.357,
    "l": 47.255
  },
  "oklch": {
    "l": 0.58293,
    "c": 0.11416,
    "h": 245
  },
  "luminance": 0.20058
}

Semantic roles & 50–950 ramp

primary

#3781BA

secondary

#C8A285

accent

#8A4ADE

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3781BA

Body copy rendered with the generated semantic roles for this colour.

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